... withthe external network connection 1/3" SONY CCD h264 4 channel cctv system 4CH DVR-----(Model:DVR4004)1. H.264 ... . Live, recording, playback, backup & remote access8. Provide single / 4 channel audio function9. Support picture in picture display, OSD interfaces, support ... optional), directly connected to the display, synchronized with the monitor 18 Support high-capacity SATA hard disk19 Low stream, ...